DAE constantly ridicule yourself for being shy/introverted?

There’s been so many opportunities where I feel ive missed out due to my anxiety and shyness. In the moment I’ll even try to convince myself to overcome the shyness knowing I’ll regret my choice but I still find myself avoiding social situations and think about my decisions for the rest of my life 😕😂 it’s so frustrating! I’ve been like this my whole life, why is it so hard to just talk to people and do things??